For a terminal connection taken with sshg3, probably the easiest way to find out this, and more, is using escape sequences. Escape sequences consist of the escape character followed by a command character. The default escape character is ~ (tilde). Escape sequences must by typed directly after a newline.

Enter a newline, i.e. press Enter first, then type ~?. Your sshg3 will respond by dumping a meny of supported escape sequences on the terminal. Among them is:

~s - dump statistics and connection information to stderr

So, to see this information you'll press enter and then type ~s. Here's an example of what the output will look like: